ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
The surface temperature of pulse laser heated tungsten targets was determined by a high-speed micropyrometric method. Using a blue line of the heat radiation, a temporal/spatial resolution of 2 ns/10 μm is achieved. Temperatures were traced in the range from 2800 K to the boiling point of tungsten at about 6000 K. The accuracy is about 5%–10% because of uncertain values of the spectral emissivity. However, the accuracy of radiance temperature is limited only by the photon shot noise. Numerical calculations of the one-dimensional heat equation are in satisfactory agreement with the experimental results. If melting occurs, thermocapillary flow reduces the spatial resolution from the Abbe limit to about 10 μm.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1144287
